Don't feel bad. I bought 2 BTC for 8k each and sold them later that year for 4k each. I took a year off and then began buying again. My avg price is now 10x what I sold for but I'm still up 250%.I’m kicking myself now. I had an entire bitcoin when it was $15,000. I couldn’t handle the volatility at the time, so I got out after a couple weeks and broke even.