With the research I have made and with the current problems that developers faces in promoting their games, game on blockchain is the way forward i have only come across two projects that aims to make that happen. They are EOT and BGX, you should carry out further research on them the innovation is very brilliant.

It is better to buy during ICO due to its benefits. Most or even all ICO tend to attach a bonus in respect to a particular amount of their tokens you want to buy, so when you buy during ICO it's not only cheap compared to market but also comes a bonus benefit.

It's not a bad idea to have lots of altcoins but even if you want to own a few, just make sure they are highly potential ones that you are about 98% sure will generate a lot of future liquidity and to be sure about this follow those particular altcoins you are interested in km their social medias to get useful info and also read their whitepaper to know what they are offering