If all coins are going down its time to buy or wait for more dump?
I have 300$ what i can buy and how much i will get after 2months?
Check the market cap and observed the volatile of coins what you want to bought. You cannot guarantee if you want to heard the advice of all people here. Better do your own strategy. Because that can cost of risky, Its up to you this is only a good advice that I can advice for you.