Choosing a top altcoin is the best choice we can make, where they have popularity and also a market capitalization that can show that they are very strong and able to compete with other altcoins, but you need to pay more attention to the project so as not to choose the wrong altcoin, even for projects that are in the top 10, we know Luna is also a very good coin and was once in the top 10 but they got destroyed in just a matter of hours.
That is the best procedure to follow when choosing altcoins because investment in that space comes with a lot of risk and if care is not taken, you can either lose some or all your investment along the way, since doing otherwise will only lead to kios that may result in some many unpleasant outcomes.
Because most of the altcoin projects are mostly scams this day that that make it hard for investors to be able to choose the right coin to buy into when they are still at their pre-sale stage which is the most risky stage to invest in any project.