Dont regret what you have done. Bitcoin pumps hard, But don't forget it also dumped and the price reached nearly $3k. I also sold out all of my Bitcoin to make a house. But I am happy with it.

Now again trying to accumulate BTC on every dump. Maybe the amount is very low But for the long-term investment, it's a good way to collect some satoshi. Always there will be another chance, so wait for it.