The sole purpose of bitcoin is as a currency. I've written many times before that it's terrible as a currency. As a means of exchange, there are massive systemic problems with bitcoin, there are hard limits on the number of transactions that can be verified, so when it gets popular you can't actually use it because it takes so long for the system to process. As a method of accounting, it's worthless because of the huge swings in valuation that hodlers think is a feature, not a bug. How many bitcoins for a loaf of bread? You can't know on a day to day basis, because it might be 3,000 per bitcoin, it might be 30,000 per bitcoin. Finally, as a store of value it's terrible for the same reason. It feels great right now when the 3,000 per bitcoin coins you own are going up, but what about when you saved a bunch of bitcoin at 30,000 per coin and it drops to 3,000 then you just lost everything.

It's basically a pyramid scheme with no value as a currency, and eventually pyramid schemes leave a lot of people holding the bag. You don't want to be one of the winners when that happens, because governments don't take kindly to pyramid schemes.