This can be counted as a development, but most of time BTC is used for gambling or illegal business, although there are plenty of places where BTC can be more useful.

indeed, many projects have the theme of gambling and betting. but I don't think it's all like that. only a few projects. so we can choose projects that are truly based on business
Most of the recent ICOs are related to gambling and interesting fact is that recently projects which reach soft cap are they.