Top coins that follows Bitcoin market movement most of the time provide decent profits, not that much compared with a new coin that really create big pump but better enough than risking with an unknown team which most of the time can create short pump then the project die after, I also agree on that part where timing is important, while value still low and you have a good amount of spare money, buying portion by portion of your chosen asset may increase the chance of making money once the market start to pump the value of the coin / project that you select.
Yes. That's right, crypto assets do have fluctuating price movements that can change very quickly, making them a target for traders and their price movements are very much influenced by supply-demand conditions. So, if OP want to have quantity, choose Altcoin ar meme, but if you talk about quality, choose BTC and that is very mainstream because of its fundamental aspects.
Choosing the best coin like Bitcoin is preferred if you are a long-term holder. But if you are aiming for the short term, we can take the opportunity to make a profit from the price fluctuations and hype that these meme coins do. It is important to know and get familiar with the market situation as it corresponds to opportunity as well. That is why I don't just accumulate BTC alone as I also buy a few altcoins because, in this way, I could generate more profit. But I would say that it all depends on our risk appetite, some can't take more so they will just focus on BTC alone.