I've pretty much doubled my investment on both TRX and XRP.
Are we expecting these coins to pump even further still?
Not possible but never give a huge expectation to them. We are apparently in the hypes that is why to goes like that but if you are thinking that it will sustain for a long time, that I could say it seems impossible.
So I suggest to you that if you are in doubled profit this time, then just sell it (depending on how much you sell) but at least you secure your funds first and let your profit play. Everything is unpredictable, so we have to be smart as well to avoid such regrets that we mostly experience in the last Bullrun.