I think to have a bull market up-coming is the best way to move all the money that you have in altcoins to bitcoin, because with market dominance of Bitcoin the market will go green, and the bull run with start, as far as I am concerned from the previous experience of the bull run more than 55% bitcoin was dominant in the market.
Suggestions?
Maybe yes, it is good to move now in Bitcoin! Because bitcoin now is too low and then it is good to hold bitcoin now, hold it for about a year for sure you will gain profit. Maybe it will times 2 or 3.

Go for bitcoin now!