I am really unsure about the future of Monero.
It may be the coin that gets shot full of the most holes.

That said, i would keep part of my stash in Monero.
I would actively work on accepting Monero if i was in the business of selling things on-line.

McAfee may be full of drugs... but he is not wrong.
Well, mostly not wrong.

The thing is that there is a substantial amount of people who just want to bet on price movements.
And bitcoin is excellent for that.
And there are people that want to own the shiny that everyone is after.
And bitcoin is excellent for that.

I believe, in the future, most cryptos will be valued in bitcoin
but no one will use it.
Central banks, govern-cements and mulit-national corporations will use bitcoin to settle accounts.
All entities that want bitcoin to be slow, completely transparent, and very elite.