I have sold my BTC earlier @$31k-$35k range long ago. I have invested in altcoin then and made some great profits although I had to lose 50% at the end. Now, I own almost no cryptocurrency other than USDT and a few trash coins.
Yesterday, I was scrolling newsfeed on twitter and got someone tweeted like this, "No BTC holding is risky.' This is somewhat true when I thought it deeply. Now, I got the same feeling. It’s risky to not own any bitcoin. Fiat is getting devalued all the time.
You have taken the wrong step, even though bitcoin is in a good trend at the moment in the market, this shows that there is no risk of holding bitcoin all the time, although in general you have not suffered big losses, but I think you have wasted a good opportunity at this time .
Altcoins also don't matter if we invest, even more perfect if we can also use bitcoin simultaneously in investing with altcoins, if one of them is problematic, then there are other coins that can provide good returns, that's why bitcoin and altcoins need to be invested simultaneously .
You should never sell bitcoin and always think to accumulate them. The future is of bitcoins and i believe that those who do not have bitcoin will be left behind.
You can trade or sell your altcoins but always keep on holding bitcoins.