Present valuations are an aggregate of what investors (and speculators, in the case of the secondary prediction market) believe about their future.
If by 'collapse' you really mean a 50%+ fall, timing is not going to make or break you by any means.
You linked to a betting market that ends in a week and then said that timing isn't important. I don't understand you.
You linked to a betting market that ends in a week and then said that timing isn't important. I don't understand you.