Choosing altcoins is a gamble. Either it will be a successful one or it will fail. And the profit-making thing is optional. It may follow the sentiment and pump in price or I won't be able to do it even once.
Also, the fact that altcoins have fewer use cases, and for that, after a huge pump in price, if it falls, it may never go up again. Even after hodling for years. Once it's gone, it's gone. So it is hard to compete with others and choose the right time to sell.
Why take that risk when I can just rely on BTC? I can sell in portions in different price ranges. That will maximize the profit and also I won't regret selling early or late.
Talk about altcoins, we are talking about gambling rather than investing, as these projects thrive on hype only to eventually dissipate. Altcoins don't have any technology or utility, it's all just pump and dump. However, if an individual possesses a proclivity for gambling and revels risks to potentially substantial rewards, then exploring altcoins might align with their personal inclinations and choices.
Bitcoin will remain a safer investment than altcoins. But I also don't hate someone investing in altcoins because they're investing with their own money. We have no right to intervene or teach them anything because we cannot help them.