The entire cryptocurrency market capitalization is a toddler when compared to the global markets like the stock market and the commodity market. considering where Bitcoin started, the whole ecosystem have come a long way since the past decade.
Bitcoin has been the dominant cryptocurrency for long now, I think that could change in the future. For the market to grow large and compete with global market, its becoming clear that other cryptocurrencies might rise to compete with the Bitcoin's marketcap. Top players from the traditional market need to get involved in cryptocurrency and issue decentralized products, the space need a lot of attention at this time. Such close competition could be setting the stage for a multi trillion crypto market.
But then, what is uncertain is regulation, can cryptocurrency grow into a multi-trilion market without the proper regulations?
It is unlikely that if an important business releases their own coin that this coin is going to be decentralized, and even if those were their intentions it is unlikely the governments around the world would allow it, just take a look at the project of Facebook releasing their own coin and how that turned out, as such bitcoin cannot be threatened and the longer the time it passes before a challenger appears the more difficult it becomes to surpass it as anyone that wants to get in this market most likely buys bitcoin and not any other coin.