Hopefully the last big crash will be a learning experience for everyone to always exercise due diligence to research and invest responsibly. Cryptocurrencies, in my opinion, have no other way to go but up. There may be these mania and correction phases, but it is headed to mass adoption soon before we know it. It's really hard to take away the value from Bitcoin since it has been used for almost a decade, and the resources required to mine this currency is no joke. Perhaps, we already found the rock bottom at 6k.