I found HEX by watching a youtube channel and I believe in HEX because Richard Heart seems like a smart dude. I sold because I was dumb back then.
You are not dumb, but you are unlucky, every coin has a chance to go up more than 10x, but it's all up to the project development team and community, don't blame yourself, there are many other coins that have prices and market caps under $10 million usd , you can become a millionaire when you are a little patient, but it will be difficult, because the price of crypto coins fluctuates, take the positive side from the latest news about the project, such as Halving and Burn coins, from there the price can go up.
There shouldn't be a lot to worry about if every investors use money that they can afford to lose only on crypto, problem use money they aren't ready to lose that's why they lack patience when holding, they can't withstand seeing their wallet lose 50% of value either.