And same like your friend there are so many like him who are aslo expecting the price to fall back at 24-26k before they actually buy because they feel and act greedy by thinking that if they buy it at the actually price now they would be at the loss but like you said no one knows how the price is going to be and hopefully the price might go down as they speculate but the chances of that happening is also two sided because the price rate can either continue to pump leaving you to either procrastinate more or buy at an even higher price. Sometimes most newbie who are eager to buy after acquiring little knowledge on bitcoin investment are the ones who are mostly victims to such actions.
But to me, the safest way to make such a buying plan in a situation where one doesn't know what's to come next in price is to share the amount that has been set aside for the Bitcoin buying purpose and use half of it to purchase at the current price, leaving the other half to be used hopefully when the price drops to their expected amount, so that if the price of Bitcoin is to skyrocket, they will not completely regret their action and will not completely regret their action. They will have a little holdings that they can take a small profit from. If the price also drops as they predict, they can buy more and add to what they have accumulated earlier.
Hmm, an interesting idea but the only side effect I see about this your thought would be the fact that not everyone knows your how to manage their resources quite well and by the way, money has a way of getting involved into other unnecessary things you don't plan for especially when you are just hoping to use it for an upcoming action. But notwithstanding the idea is not bad at all because the ratio of you losing and also maybe having regret will be at minimal that's if you actually stick to your actual plan of buying with half the funds and waiting to see how the market turns out (dip) to buy more. But if am to choose I think I will just go with the DCA strategy knowing fully well am heading somewhere and only the thought of adding to my investment by every little fraction will be on my head and that way if the price pumps I gain and if it still dips I continue buying and so doing increasing the amount on my portfolio slowly for the actual mega pump that will profit me.