It is already the most dominant digital currency, and I don't see anything snooping away from Bitcoin's position in the coming years as I believe the adoption will only become stronger. It's of course no guarantee that it will really happen, but the decentralized aspect is what will draw attention from people. It's the eye catcher feature as people are looking for ways to avoid dealing with banks and governments. People want financial freedom for once in their life, and exactly this will lead to people slowly but steadily jumping into Bitcoin. In that regard, it's definitely not the future of money, but it's more the future digital "Gold" kind of tool.