I've been watching this Bitcoin video: https://youtu.be/ZIugzFygviw?t=294
At the linked-to timestamp, he claims that:
Due to bugs, at first, anyone could spend anyone's coins!
I'm not saying that I think he's lying, but was Bitcoin really that buggy initially? That's honestly a bit shocking to hear for me. I did think that Bitcoin was quite solid from the very first v1.0, and has only been "expanded upon" with BIPs ever since. I did not know that such serious bugs existed early on.
Exactly how early are we talking? I had coins in 2009 or 2010. So, back then, anyone could just spend those even though only I had the private keys? And this extremely serious bug was somehow fixed without breaking Bitcoin?