Perfectly said when ever their you see a all time high price then it is a sign of that very soon we can see profit booking so it is always recommened that dont go all in for selling better go with 10 or 20% of totall btc you have so like this on every high price you are getting some profit because surely you will get some lower rates also.
depends.
look at the nature of this all time high. it wasn't the result of a bubble. it's been a year in the making. there isn't talk from people of taking out loans and shit. there's very little media coverage. that isn't the recipe for a 2013 style collapse.
it's either gonna fall back and settle down still pretty high, or it's laying the foundations for a real bubble. not the greatest time to try and predict what'll happen.
regarding the original question, it's important that bitcoin does have some utility beyond just sitting there. despite that it's a shitty system for buying modest stuff. fees are too high. transactions too slow.
there's no incentive to spend it unless you're already sitting on a massive gain. even then you'd probably prefer to hope for more massive gains. currency use comes last.