My total focus will be on Bitcoin. i have no faith in altcoins. it's centralized and could fall on its face at any moment. i have seen many projects of altcoins fall in this bear market and many barely holding their ground. some are even afraid to list their tokens in the market because of the current bear market situation.
their fear is reasonable and that's why they are bad for long-term investment plans.
only smart thing to do will be to fill your bag with Bitcoin
Come to think of it, is this not the reason why altcoin brings higher return of investment than Bitcoin, its crypto, the higher the risk the higher the profits, many altcoins won't survive but those who do will bring massive gains thats why you need up to 5 altcoins in a wallet, ive never seen where all 5 projects failed and 1 project is enough to bring the gains even if we have to assume that the rest can fail.
With good research on altcoins there is not much worries with diversification.