Many people regret that they did not buy BTC while they first knew about it. For some, they did not sell BTC while they could. 
For me, I got MWC & HEX for free from airdrop to BTC HODLers, but dumped them before they peak. I could easily make 10x of my existing BTC, if I held them strong.
What is your Biggest Crypto Regret?
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Most of them are coming from airdrops one of them is Ebtc I did not expect it to reach $1 but I only sold it at 20 cents that wa2 years ago I do not have confidence in airdrops but back then, it's part of investing and being a holder you have to keep up and dig deep for every coins that you are following.
For me, I got MWC & HEX for free from airdrop to BTC HODLers, but dumped them before they peak. I could easily make 10x of my existing BTC, if I held them strong.
What is your Biggest Crypto Regret?
[/quote
Most of them are coming from airdrops one of them is Ebtc I did not expect it to reach $1 but I only sold it at 20 cents that wa2 years ago I do not have confidence in airdrops but back then, it's part of investing and being a holder you have to keep up and dig deep for every coins that you are following.