Bitcoin dominance has been like that for quite a considerable amount of time now. But that won't be sufficient reason to say that altcoins are being "boycotted". Many people still invest in altcoins. It's just that Bitcoin is the people's safe place to retreat to when the altcoins underperform.
For some time people start thinking this way and they spread bad news but its ridiculous to talk that wrong. Crypto is anonymous since earlier and we know very well that price will down and rise, the same way some people like it and some don't, I have heard only a few countries in turn world are there who do not adopt crypto but the remaining whole world do invest and use altcoins.