In this case, I think a clear inversed head and shoulder pattern is forming, which is a strong reversal signal if the neckline is broken. Coincidentally, if BTC happens to break through the neckline, it might also simultaneosuly break the important purple trendline.
These two singals together would confirm that BTC is breaking out of the and is forming a new . In that case, the first major target will be around 17.500 USD. With a strong BTC move, I believe many alts will suffer. Hence, I closed some of my alt positions and will not enter any new trades, before there is confirmation of where BTC is moving.