Nobody else has made much of a mention of physical security, yet. You may also like to consider the possibility of:

1. Fire; do you have another copy of your private keys if your building burns down? Of course, storing additional copies adds additional risk of compromise.
2. Natural disasters; depending on location, you may also need to consider the possibility of flood, tsunami, tornado, volcano. Also consider unnatural disasters such as war.
3. Theft while unattended; if someone knew you had cryptocurrency of substantial value, might they just steal your computer hardware and read the contents of the hard disk? Is your password on a sticky note under your keyboard? (or on your monitor!)
4. Theft while attended; ie if a thief held a gun to your head...
5. Hardware failure; storage media gets corrupted sometimes, or just stops working.
6. Advising next-of-kin how to access the funds, without compromising them in the meantime.
7. Getting out of sync; if your backup copy is missing some of the most recent private keys, they are at risk. Using a deterministic wallet helps solve this one.

I know this isn't a complete answer, but each case will depend on individual circumstances and this may still be useful enough to deserve an upvote :-)

Nobody else has made much of a mention of physical security, yet. You may also like to consider the possibility of:

1. Fire; do you have another copy of your private keys if your building burns down? Of course, storing additional copies adds additional risk of compromise.
2. Natural disasters; depending on location, you may also need to consider the possibility of flood, tsunami, tornado, volcano. Also consider unnatural disasters such as war.
3. Theft while unattended; if someone knew you had cryptocurrency of substantial value, might they just steal your computer hardware and read the contents of the hard disk? Is your password on a sticky note under your keyboard? (or on your monitor!)
4. Theft while attended; ie if a thief held a gun to your head...
5. Hardware failure; storage media gets corrupted sometimes, or just stops working.
6. Advising next-of-kin how to access the funds, without compromising them in the meantime.
7. Getting out of sync; if your backup copy is missing some of the most recent private keys, they are at risk. Using a deterministic wallet helps solve this one.

I know this isn't a complete answer, but each case will depend on individual circumstances and this may still be useful.

Nobody else has mentioned physical security, yet. You may also like to consider the possibility of:

1. Fire; do you have another copy of your private keys if your building burns down? Of course, storing additional copies adds additional risk of compromise.
2. Natural disasters; depending on location, you may also need to consider the possibility of flood, tsunami, tornado, volcano. Also consider unnatural disasters such as war.
3. Theft while unattended; if someone knew you had cryptocurrency of substantial value, might they just steal your computer hardware and read the contents of the hard disk? Is your password on a sticky note under your keyboard? (or on your monitor!)
4. Theft while attended; ie if a thief held a gun to your head...
5. Hardware failure; storage media gets corrupted sometimes, or just stops working.
6. Advising next-of-kin how to access the funds, without compromising them in the meantime.

I know this isn't a complete answer, but each case will depend on individual circumstances and this may still be useful enough to deserve an upvote :-)

Nobody else has made much of a mention of physical security, yet. You may also like to consider the possibility of:

1. Fire; do you have another copy of your private keys if your building burns down? Of course, storing additional copies adds additional risk of compromise.
2. Natural disasters; depending on location, you may also need to consider the possibility of flood, tsunami, tornado, volcano. Also consider unnatural disasters such as war.
3. Theft while unattended; if someone knew you had cryptocurrency of substantial value, might they just steal your computer hardware and read the contents of the hard disk? Is your password on a sticky note under your keyboard? (or on your monitor!)
4. Theft while attended; ie if a thief held a gun to your head...
5. Hardware failure; storage media gets corrupted sometimes, or just stops working.
6. Advising next-of-kin how to access the funds, without compromising them in the meantime.
7. Getting out of sync; if your backup copy is missing some of the most recent private keys, they are at risk. Using a deterministic wallet helps solve this one.

I know this isn't a complete answer, but each case will depend on individual circumstances and this may still be useful enough to deserve an upvote :-)