maybe because it hasn't evolved a bit since then and the average Joe can't grasp it preventing it to reach mainstream
But i get it security wise there's no doubt it has proven it is secure ans solid

usdt and stablecoins are the future  

3rd on marketcap, highest volume, doesn't compensate inflation tho but it doesn't 60% from one day to another. I mean one day you can buy a lambo the next a lada