it is quite possible, reasons behind his arguments are solid, I would say maybe it is a bit too much optimist but who knows... anyway it does not sounds crazy to me what he says
It might be possible but only if bitcoin crosses all the hurdles which it might face in its way to become such a valuable asset. If with 100 billion dollar market cap we could reach 7000$ we want a market cap of may be a trillion dollars. Its surely too optimistic.