I agree that the safest crypto coin is Bitcoin. So if someone wants to have a safe investment, kindly choose Bitcoin. But if expecting bigger profits, why don't choose altcoins? We don't choose shit altcoins, meme coins, or weak altcoins. We can choose top altcoins, there are some top altcoins that look very potential to grow massively in the future. Just take a look at ETH, BNB, Matic, and some other top altcoins. Avoid the altcoins that have bad issues!
I think it will better to not invest all in Btc because buying one coin is not good at all. i will recommend to buy 40% Btc and hold it for long term, another 40% use for buying major altcoins Bnb, Eth, Matic, Xrp and another 20% for risky coins which has possibility of high Profit in bull run. These risky coins can include Web3 and Metaverse coins and Doge should also be added in this portion because anytime Elon can push it to high level.
Buying coins is only profitable if buying entry is good. suppose one person taken entry in btc when it was above 50k then his portfolio will be half despite of investing in safe coin because his buying entry was wrong. we should always buy in dip and bear market if we want to make double profit.