Actually, it is clear what he wants to turn X into. He has said several times and there are rumors, that he wants to turn into chat+wallet+payment system+something. X has 4 tops, each top will symbolize a use case. He wants to turn X into something that you will be able: someone send you a tweet with a link, you click on it and pay for good or service. Sort of an NFC thing. Plus other features. First of all he will implement fiat there. I dont know how much time it will take them to develop all those features for X, but it will take a lot of time definitely. And discussing right now which altcoin he will integrate into it, or will it be bitcoin, seems for me like forecasting weather for specific day in few years (which is impossible).
Elon wants to turn X into a super-app like WeChat in China, where people can chat and pay easily. X-payment has been created but it has not been officially released yet because it needs to have enough operating licenses in many states in the US. According to my knowledge, the licensing process is going quite well and X-payment will soon be launched nationwide in the US. Fiat will definitely be supported, crypto is only a possibility because we all know that Elon loves crypto, Twitter has also supported tipping with BTC.
I think X-payment will appear this year and then we will have the clearest answer from Elon himself! Although USDT is also a good option because it is stable and pegged to USD, I still support XBT and DOGE ^^
Which is XBT? It's my first time coming across such abbreviation, is XBT a coin or a payment system that is being developed by X, forgive my ignorance, but I've actually tried looking for this on coinmarketcap, but does look the coins I saw with such abbreviation will ever have anything to do with X, I am only certain about Doge coin, I personally have believed that there so not way Elon musk will launch X payment without integrating doge coin as one of the payment options..
And speaking of when this will be launched, well, might be possible in the middle of the coming bull run, I believe that launching the X payment with crypto supported might end up as one of the catalyst that could cause alot of people to fomo into crypto, just like it was in 2017/2018 bull run - anyways, finger crossed while we wait for what the future holds.
EDIT: I just noticed the poll, and from there, I discovered that XBT is BTC, but am curious to know why BTC was abb. As XBT..🤔