It is a big risk to go all in.
How much you have to invest is not really important for that decision, you should always diversify a bit even if you start with $50.
I suggest you to split in 3, for something a bit safe $200 in BTC then $150 in 2 others projects.
or you can try something like this :
$200 in BTC
$150 in STRAT
$75 in an other project
$75 in an other project
This is good suggestion amd include for the example. I like to split my portofolio into some different altcoin since i can reduce the risk involve ( although not zero risk ).
In above example, it is already expalined very well but you do something different about the amount. Just explore what altcoin do you prefer.