Lots of people feel this way about cryptocurrency and it is understandable - this is what happens when you buy into something that is so volatile. Most people hold their money in a bank under a much more stable currency - that means it's value isn't dropping 10% or raising 10% every day, so you have some comfort in knowing your wealth will stay relatively steady. You don't get that comfort from crypto because so many people are using it for so many different purposes, but it is being primarily used as a speculative asset instead of the functional currency. It was never going to overthrow any major currency, purely because it cannot handle the volume of transactions that take place in the world day to day at an effective cost price and speed.