Well, all new technology will have bugs. As a software developer, I know this all too well. I wouldn't be freaking out at all right now.
However, you mention diversity. This is a wise strategy with any investment. Never put all your eggs into a single basket.
I actually had a very small amount in ETH during the crash (it was in other ERC20 type tokens) and was able to accumulate more and make a quick profit. Staying diversified offsets your risks greatly.
I agree. You can't take anything for granted. But especially in these sorts of markets you need to diversify. Iam sure crypto has a great future but which coins survive has yet to be seen!