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
If you are risk averse and don't have much knowledge to choose an altcoin to invest in, then bitcoin should be the only coin you hold. But not all altcoins will die and crash as you have seen this year. You look at ETH, it's also an altcoin, but it co-exists with bitcoin and stands firm in the market no matter how many altcoins crash over the years. I also don't encourage people to invest in altcoins, but I believe that not all useless altcoins are scams.