The masses will be attracted to whatever is easiest to use, popular, or integrated with whatever they're already using, whether centralized or decentralized. Anything that isn't on a decentralized blockchain will likely be hacked at some point, losing people's money and/or destroying it, scaring people away, and potentially going out of business, eventually leaving behind only decentralized systems.

I don't think the masses need to understand decentralization or blockchain, just as they don't need to understand tcp/ip or html5. You only need the people crating the systems and those using the systems to build businesses to understand what it is. Since decentralized blockchains have competitive advantages for business, and centralized systems are inherently risky and not likely to be open to just anyone, smart business will tend to go for the decentralized systems.

I think.