Year 2018 seems to have the most prolonged dip from what i have seen so far. Some people had serious loss along the line; some vowed never to invest in cryptocurrency again; some sold all their assets and left.
Your encounters though might seem not encouraging, but do you know that you are better of than the person that is just coming in, because of what you now know.
Let go of your mistakes, but whenever you remember them, tell yourself it is not yet over, the crypto space will still get better and you will be glad you're still in the system.
That's when it gets better and is ready for such downturns, and volatility will decrease, then we can consider this technology. In the meantime, I think you should not tolerate losses that are now clearly inevitable.