It's used for nothing, it's just a coin that popped out of nowhere and now has value because of the hype. I don't know on how many holders are there now but those people are just want to get something from their investment on eBTC. Don't think that this coin will be something in the future and expect that there will be another bitcoin wannabe coin that will be named, aBTc, bBtc, cBTc etc.