Thing is, Doge seem fun and all by its community but this is, at the same time, what will makes serious investors and serious businesses not want to join and participate. If they do, Doge will become serious and not fun anymore which is in contrast of why it is taking off.
You're wrong there. A Google dev came on r/dogecoin 2 weeks ago asking for opinions about it's development and future use on their services. Big business is already taking notice of Dogecoin.