I think one of the biggest drawbacks with BTC are the long transaction times.
So, if there's going to be an alternative coin getting to be (relatively) 'mainstream', I'm sure it'll have to be one with short transaction times. Of all the 390527835098723 recently introduced CloneCoins, Worldcoin seems to be the most popular (for whatever reason) at this moment.
I'm curious if this one is going to stick, or if another coin will overtake. To get to a conclusion on this, I think it's important to see if there's other things that new coins could improve on, relative to WDC and BTC. For example, how bloated will WDC's blockchain get? I think this is a problem with Bitcoin, and I'm not sure how Worldcoin handles this. Any input from people less nooby than I?
Personally, I hope it sticks, I really love those fast transactions