It's all choice and your long term plan. Personally, I won't hold just one token, its too damn risky. Versatility is the key. Don't keep all your eggs in one basket. Always spread the investment. And do some staking on reliable Decentralized Finance platforms, it further expands your profit margins, though a little bit more risky
But if it is bitcoin then it will be different, bitcoin is the only and safest option for you. You don't need to split the baskets if you hold bitcoin.
Sometimes, you don't need to buy too many coins for your portfolio. It can help you minimize the risk of dividing assets into many baskets, but sometimes it will not be optimal profit if you have too many junk coins.
For that a good choice is the top coins which are like Bitcoin, Ethereum, and BNB,
put these coins into our portfolio I think a good decision and for long term investment is also promising,
Regardless of what it is, the most important thing is that we have to be smart in choosing coins and do some research first