I always want to know the situation of cryptocurrency and stocks relatively. Current marketcap of stocks is 70 trillion and cryptocurrency market cap is 178 billion.Speculators says that cryptocurrency market reaches 1 trillion marketcap in 2019. What do you think, will it takes few years for crypto market to reach stock market cap or is impossible? or can it overtake stocks?
The way to answer this question is to look at other currencies (since cryptos are essentially a form of currency). A medium-large currency is the British Pound. It's not a monster like the Yen, Euro, Yuan, or Dollar. But it's not small either.
The current money supply of the British Pound is roughly $2 trillion. Given that, could cryptos reach $1 trillion market cap? Almost certainly. But can it overtake stocks? That's like asking if the British Pound can "overtake stocks". Any trader will tell you that is comparing apples to oranges. Instead, what would happen is that cryptos would become an accepted store of value and transaction media for buying stocks.