No, that's not correct; it can only be a good tactic for anyone who sees it as one for them. After taking a snippet of most of the comments here, I see that some people really kick against it, while some people also think it's a good tactic for them. But no one has confirmed that out of the top 10 market cap tokens they bought, about five have really made them a good profit in the long run. Let's take, for example, the Doge coin, which was first taken as a joke coin in the beginning, but after the coin price began to go high, it was added to the top 10 coins. Do you still see dogecoin in the top 10 today? (Nop) I believe people who invested in the coin when they saw it in the top 10 are still waiting for another pump to happen again. Another example is the Luna coin that @Sir legend mentioned below.
This was a good example 👍🏻
I only focus on myself with the bitcoins that I have and of course apart from other people who are doing things in altcoins, that's their business.
Sure, you can say it's their business or whatever, but again, some crypto beginners just fall into this top 10 coin or token without realizing that it doesn't even minimize their risk of investment. They sometimes think that since they are spreading their funds on different altcoins, it can limit the risk, and at least they can make profit from most of those coins, of which even all those coins can turn out to be shitcoins. I just feel so softhearted and wish I could help everyone at once by letting them understand the risk that also follows the tactics (most especially beginners). But for those who are already aware of what the results may be, they don't rely on their high hopes, and even if they lose their investment, they already realize they were only trying their luck with altcoins. But some people don't think that way, and if those people lose their investment, they can be faced with some emotional troubles.