Perhaps the greatest risk associated with EOS is that it will simply never catch up to Ethereum and become the top platform for DApps and ICOs. This is a legitimate risk because Ethereum is already roughly 7 times larger than EOS is. Also, Ethereum was established years before EOS was, and already had won a large portion of the market share before EOS was even created.
However, EOS was specifically designed to be able to handle rapid scaling, which is something that many people complain about in regards to Ethereum. So, if EOS can truly resolve some of the main pain points associated with Ethereum, then it could potentially steal some of Ethereum’s market share.
Also, despite the fact that there is a small chance that one of the main DApp platforms will take the lion’s share of the market, it is unlikely that one platform will ever hold a true monopoly and control 100 percent of the market. This rarely happens in business, because competition naturally divides control of markets. For example, Google is a dominant search engine, but Bing, Yahoo, and others all control significant market shares. The same phenomenon will likely play out with DApp platforms.