I'm now 21, and I have about 99.9% of my wealth in Bitcoin, I started to accumulate since 2013 till today, almost going to buy every time there's a dip (consolidation).
Many people have same goal/dream like me, hoping that Bitcoin will grant them earlier retirement or luxury life, but what could go wrong?
What's the possible scenario that could render Bitcoin into worthless, and what're the probabilities of that happening?
Don't get me wrong, I love Bitcoin, and I like how it makes us able to afford luxurious stuff, but I also wanted to be mentally prepared for the worst possible scenario.
If you are gathering bitcoins from 2013, you should have a good stack of them by now. If you are so worried about a possible crash, maybe you should spread your investments on other assets as well (gold is always a good option). As for what it could go wrong, it's hard to tell. Governments could go against bitcoin. They can't ban it for good, we would have to trade them underground, so the value would probably drop, because a lot of investors would get out from bitcoin, but I don't think you would ever lose all your wealth.
The worst scenario would be bitcoin being surpassed by another coin, and everyone would switch to that, and in that case, BTC would become useless. I don't think this will happen though, there is plenty of space for more coins, and bitcoin still has a lot of potencial.
Finally a chain split on a hard fork could also destroy bitcoin. I don't know what it would take for this to happen though, but I trust the devs working on the network, so we should be fine.