Hello guys!, In your years of experience investing in crypto, aware of its volatility, what coin or token maybe you regret selling the most? Maybe today when you look at the market you cry because maybe the coin you sell last month is life-changing in price already. 
I regret selling bitcoin. If I had only held it by then, well I would have some very very decent profits
But it's not something I dwell upon, just a valuable lesson for future.