I will not completely subscribe to the idea of getting rid of all altcoins because there are few that are worth holding like SOL, ETH and a few others. Their profit potential is high, maybe even higher than bitcoin but that does not mean one should go all in on them. What I will always recommend is anywhere close to 80% bitcoin and 20% altcoin so that one will minimize risk and maximize profits. This is how I plan to proceed, others might have better formular for allocation.
Sounds like a solid allocation.
BTC as the main anchor simply provides the most security in the crypto space, and with a small altcoin share you can still take the chances of higher profits. SOL and ETH are definitely among the stronger candidates - they not only have hype, but also real usage and developer activity.
In the end, it all comes down to your own risk appetite anyway. Some prefer to play it safe, others want to gamble more. The important thing is not to invest everything in projects you're not convinced about.
80/20 sounds like a good balance between "sleeping soundly" and "still getting a slice of the cake".