I know its trivial in light of the fact this is a thread about XMR price speculation: but for the record XMR has just smashed the ATH in terms of USD and the buy/sell ratio (while clearly manipulated) looks very healthy, suggesting the next week is going to be extremely positive.
Of course, it could all just be about Risto....
I think the bitcoin price is more important. It means it is taking more market share from bitcoin.
Other comments about whether one is investing in (or speculating on) market share or overall crypto success are valid, but I would also say that the concept of market share assumes there is one market. What if Bitcoin and at least some of the others address fundamentally different (or different but only partially overlapping) markets?