$1000+ dollars made using bitcoin !

last 3 days ago i checked bitcoin was going down, i thought should i invest in it or not , because it's a time market is going down, but market can jump at anytime, so i just invested blindly $4000+ in btc, but today i checked btc jumped from $6000 to $8000.
so what i got , i just earned 4 figures in just 2 days , i can't say that you can also earn , but i just tried my luck and got success , so the question is should i invest again because its high , so i am not investing , if here is any expert advice me wisely :)
it will help me , because i am new in this market !