That is too small for investment in bitcoin, I can say you should spend it in alts as the pump mostly occur there but if you want a secured gains I think bitcoin is better.
$200 still worth for investment capital in bitcoin but indeed if he able to get profit then the profit also will not so high unless he increase the amount and investing at altcoin is more risky than bitcoin because there was several altcoin which is can be dumped more than 50% in the same day so if he has any plan to investing using those amount then stick to bitcoin is much better