With my company we do 401k through Fidelity. Actually two different companies I work for at the same time. I'm fully vested and have been doing this for 3yrs now, maybe four heck I can't remember lol, but I have about $180k in these fidelity accounts. I was using Betterment for an old 401k that did well and I'd like to transfer what I could either to betterment or to RH strategies. Betterment charges .25% with no cap and honestly all they do is stick it in VOO. RH strategies seem to diversity a little more and I like the thought of that. Plus they cap at $100k. Currently I have about $400k there so that's been saving me.
To the original question, can I take a 401k that I'm actively putting money into and move it to RH to basically zero out or leave maybe a smaller amount in it? Lately I've had that account doing FXIAX and it's grown enough to need a little diversification. I see they have their FidelityGO but I'm not sure how good that is.