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
Very precise. I agree with you. Need to be divided for all coins that have the most frequently used qualities. If only 1 coin is used to invest it is very detrimental, it will cause losses. It's better to be wise in investing. Because investing is very risky.