I know to option to store bitcoin.
1) A wallet
2) A exchange
but both are unsafe
As far as i know wallet save the coins offline in your phone and hence if you break your phone or lost it coins are gone. And exchanges can be hacked too.
so what will be safe to store a bitcoin/ ehereum. also is it safe to buy a bitcoin/ethereum without knowing what I'm doing exacly unlike the stocks(where we have to read all the books and stay updated and all).