I don't know him that but his prediction is realistic. I guess the sentiment of the community will go towards him as he's saying that it shall be reached by 2025 which is 6 years from now.
His prediction is better than those overgrowth predictions that claims that bitcoin will reach certain highs within a year or two.
there is another factor to take into account which bend the time in crypto and it work only in small supply coins...
when the supply is very small like 21 million coins and demand is to much big and no body sell coins its surge the price to astronomical number and in this situation the marketcap is misleading somehow...
lets look on this effect in different industry like diamonds.
lets say for now that there is x=500000000 demand for y=7000000 diamonds , now in order to understand this effect we need to think what will happen if we lower y to 30000000 just for the example, in other words the demand is much more big now and its surge the price per diamond without actually selling any,
what i mean is when demand is grow and there is low supply and no body sell its surge the price per coin to astronomical number and in this point market cap is some how fucked up its hard to calculate this,
its just example what can happen with small supply coins when there is huge demand and no body sell them and there is max supply compare to diamonds and gold, its fucking surge the price to astronomical number, its happen over the history in other verticals....
for example there was few rare diamonds which the price was around 80 million dollars per diamond, the demand grow for them and no body was sell them so the price surge to 150 million dollar per diamond , so after some time was founded bunch of this diamond compare to few , the price fell to 60 miilion per diamond.
its a game of supply and demand and if supply is very low and demand is very huge and no body sell its surge the price of the supply to astronomical number.
this kind of effect cannot happen with projects with billions of coins because if the supply to much big it lose value over time and demand will never will be more then the supply in projects with billion of coins.