I discovered bitcoin when it was about $5 per coin and during that time for several reasons I could not buy it. I discovered eth and xmr when they were around $10 per coin and I could not find a good place to buy them. I discovered netko when it was about $0.05 and I could not get the wallet compiled. I probably had around 40 bitcoins and cashed them all out under $800 and I could name more.
You?
Regret in investing should not be. Think for yourself, lead your decisions are always correct, in the moment. And think constantly, otherwise it will be very difficult to live and work.