I also say that term of not keeping all eggs into one basket but in bitcoin, this is the opposite way. If you want to minimize your losses but to maximize profit, putting to bitcoin-only can be your choice. I have invested in other altcoins because it's my choice to diversify.
Bitcoin is a gem and if you have invested only into it, you have the best gem of them all. But as time passes by, you want to explore into altcoins and that's the start of knowing others of it through the researching.
For me I wanted to focus all the attention towards bitcoin for the main time. Altcoins is good while Bitcoin was on the top price, but while it's not yet taking a good productivity just let it grow all alone and gain a better profit. Research is helpful, just be patience in doing it together with the hardworks that you have in reaching your goals.
I chose to take both. I invest in bitcoin and wait for the pump moment. and I also fill my time with altcoin trading daily. I don't take risks by storing altcoins for a long time. like you who focus and believe more in the moment of bitcoin than altcoin. because the situation that supports altcoin goes up is that bitcoin is growing healthier.