~snip~ Will cryptocurrencies be able to use for payment? ~snip~
It is no need to ask this question, mate. You must know from many sources if cryptocurrency has already used for payment.
Just google or go to websites related to crypto news, then you will easily find out the info.
~snip~ Which coin do you think the best for payment in the near future?
I think the first one should be Bitcoin. Bitcoin has all indicators to be an ideal payment tool.
You need to read this article to know more :
https://medium.com/coinmonks/which-crypto-becomes-the-new-payment-system-69f95b2d2ec3