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?
Take time to really ensure that bitcoin and the altcoins are now in the bull market stage, sometimes it is tempting but it might fall further and reach its true lowest dip. What I mean is to wait further as you are sure to invest in.