It will hit trilion dollar if crysis is happen again like in 1926 and dollar inflation going prety bad. In other side bitcoin need to proof that this asset class is worth as store of value. So people will buy it and money flow in to bitcoin marketcap. I could be happen anyway, but not because of elon musk tweet. And with normal inflation like today btc could hit 1 trilion dollar at year 2080 maybe.