BTC was the first crypto, and network effects means it stands a good chance of staying on top. Like eBay, it may be the go-to crypto.
If it's true that crypto is the future -- that the entire world will switch from fiat to crypto, kicking and screaming -- then that means the entire world will likely switch to whichever crypto is on top. There are many benefits to using the same crypto that everyone else is using, especially when it comes to long-term wealth storage.
Eventually, the coins will stop being generated, and those coins will be the only thing that the world values. We won't transact in BTC, but BTC wasn't designed to transact. It was designed to store wealth. And it does that very well.
The rise of Bitcoin will prompt people to pour even more money into it. Savings accounts will look like an anachronism. You won't want to keep your money in a bank: If the entire world is hopping onto the bitcoin boat, then you currently stand to benefit from (7 billion - total BTC holders) of people that have yet to switch.
That means you will find it quite inescapable.
Now, the final nail will be when your dollars start to lose value relative to BTC. One way of looking at the BTC price is to say that the dollar's value is going down, not that BTC is getting more valuable.
Do you really want to bet the future of all mankind on this grand experiment? For all their flaws, our traditional systems have gotten us this far. The amount of upheaval that it could cause to switch the entire world from inflationary to deflationary basis of wealth isn't something to underestimate.
https://bitcoin.org/en/faq#wont-bitcoin-fall-in-a-deflationa...
There are all kinds of theories about what might happen. But let it sink in that no one knows, and we have no plan to stop this if it turns out badly.
This isn't really meant to persuade you, as that would be impossible. No one knows what will happen, so this is guesswork. But we know that if BTC does ultimately win, we will lose all economic controls: there will be no way to inject more money when needed, such as the 2008 crisis, and no strategies to prevent deflation. We will be at the whims of an algorithm that no one has any incentive to change.
Contingency plans are good. Let's come up with one.