because first of all USDT is highly risky to be involved with. even if you are holding it for a couple of minutes. it is shady at best and it can crash and burn to the ground and burn half the altcoins and some of the market with it.
also majority of people are trading altcoins with bitcoin because everyone obviously wants more bitcoin not more fiat. you earn profit on your bitcoin and the bitcoin is always rising so you are automatically making profit on that too. but if you make profit on fiat you get fiat, end of story!!!
and finally if you ever check the rises, you can see all the pumps take place with altcoins and they go up a lot versus bitcoin. it doesn't matter really if you are limiting yourself to a risky shitcoin called tether or you are freeing yourself and only invest in those coins that have potential for real rise. like those which get pumped 500% in a week.
But no one know when any shitcoin will rise 500%.
Atleast everyone know if they are holding top coins, it will rise one day or another.
We just have to buy at right price and wait for a few days or weeks.
- you can see it clearly on the market. nothing is hidden from public eyes when it comes to charts! you see the rise, in price and in volume, and also see the social media news and hype and lots of other pump indications. and it doesn't have to be 500% necessarily even if you are able to catch 10% of any 500% pump but do it almost every day you still make a lot more than sticking to some "so called top coin"!
- no nobody knows that. the coins that you call top are also getting pumped and dumped but their process is slower and much smaller. when a small one gets pumped 500% these get pumped 30-50% at best and then their dumps are hard because there are that much more people to dump them.