If you would get $10 000 to invest into Cryptocoins, at which price you would be ready to buy?
your question is all wrong.
first thing is you say "Cryptocoins" but i guess you mean bitcoin. because of your poll. if you want altcoins also as diversification then it is a very different question
second thing i can tell you is that don't think about 1 price to buy at. that is not a good way of investing money in bitcoin in my opinion.
the price is always moving, and you can never say if it is the bottom or is it still going down, or is the rise going to stop or will it continue.
for that i always suggest everyone to buy in steps. you first come up with a price range that you speculate is the bottom or won't go lower than that. for example $1900 to $2100. then you start placing all your orders.
majority of them in this range. then you place some lower orders but smaller for example you place $8000 in total of 10 orders in that range then place 2-5 orders of total size $1000 in $1800 to $1900.
also you place some orders above the highest price for example at $2200 you place 2-5 orders of total size $1000.
this way you will surely invest but also never miss a chance. for example if price dropped to $2190 and reversed back up to $10000000 you still have bought $1000 worth of bitcoin and have not missed the chance.
or if the price dropped down to $2050 and then reversed back up to $100000000 then you have invested most of your money so you can be happy anyways.
play with the above numbers both price and volume to reach a more comfortable strategy, these numbers were completely hypothetical. it is important to choose that range ($1900 to $2100 in the example) right. if you lowball that range you will only hurt your chances, and if you choose it too high, again you will hurt your chances.
p.s. good news is that even if you buy at a higher price than you feel comfortable with, you can be fairly certain that bitcoin will rise to that price again in the long term.