So your BTC was worth like 24k back then because bitcoin was cheaper. But then, I assume you invested your money because you think bitcoin was going to be more expensive in the future? And then it actually did. You should've taken a lot of extra safety precautions.

But yea, what's done is done. Hopefully you've learned your hard lesson mate; make sure it doesn't happen again in the future if it's the case that you want to invest again. Lot's more future opportunities so don't bring yourself down too much on this. Best of luck!

Also, probably read about wallets: https://cryptosec.info/wallets