I think it would be an XRP coin. An indicator of confidence in a coin is its market capitalization. XRP is in second place at coinmarketcap. But I never invest in one place, so there are several coins in my investment portfolio, which reduces the risk of losing my deposit.
Well, the fact that it is on the 2nd place does not mean that in the future it can change the place , I think ripple is not the best investment, I would take now eos or eth