The crash last summer I rode all the way down. Some of my coins I was still holding at the end of last year for 80% loss.
The start of 2018 I watched most of my coins recover their value, but didn't understand why it took so long. See the image above posted by the crypto dog on Twitter finally cleared the fog for me.
If you buy something for $4 and it looses half it's value then it's worth $2, but in order for it to go back up to $4 it needs to gain 100% of its value back.