I mostly agree with him. I think $1 million by 2020 is a bit optimistic but the market in crypto in general has nowhere to go but up in the long term. The other question of course is whether or not Bitcoin will remain king of the hill. Bitcoin has been slow to adapt and there are already a number of cryptos that are better from a technical point of view. That trend can't continue forever and Bitcoin remain #1.
I agree with you, bitcoin will continue to go up in general. This drought will come and go but it won't stay like this forever. Bitcoin will not be king but it will certainly be a store of value. I don't think it will reach 1 million by 2020 either.