I share your worries, and I believe most of the active crypto community members do. I think it'll be a niche thing targeted at mass market. Think cheap (or even free to the consumer) bitcoin/litecoin paypal, so that people can pay for coffees, clothes, food and what not.

For more complex transactions you can still use either the traditional bitcoin blockchain, or just abandon bitcoin in favor of an altcoin that emphasizes decentralization and trustless economy.