I agree that trading Bitcoin in perfect way may maximize the profit since we can short and rebuy at the bottom increasing our Bitcoin portfolio but the risk is when the market goes the other way right after we short the market. It will mean a loss to us. So many people advice that if we lack the skills and understanding of trading, hodl is always the better choice.
I also did this buy BTC and hold. And I did it DCA and I saved it in a hardware wallet.
But remember, buy and hold applies to bluechip coins, in my opinion, like BTC, ETH or BNB, in my opinion.
However, if we buy and hold with shitcoin, I cannot guarantee that our long-term investment or trading is safe. I once lost 0.8 BTC on the AMP coin in 2018-2019 because of a scam project that was trading on the Bittrex platform at that time.
So choosing a coin for this trading model must be observant and full of attention in research
Diversification is a good thing when it comes to investing but buying altcoins, I don't think it's diversification. The entire crypto market depends on bitcoin, if bitcoin crashes, then no altcoins will survive, so buying altcoins for diversification is a serious mistake, many people are making. If you want to diversify your portfolio, you should invest in non-crypto assets like gold, stocks, real estate, etc. That will ensure your safety since they are not related to each other.
DanWalker I give merit to you. I think your opinion about Diversification is very reasonable. If we spread our money only in the crypto market it is the same as Suicide. What DanWalker suggests sounds very realistic and makes sense. Even if the crypto market is f*ck*d up, our non-crypto assets will at least provide another opportunity.