Think about in projects like @utopian-io. If all economy is based on tips then this type of developments will disappear.

This will not be the case. In the current system, accounts like @utopian-io are giving away 6.5% of their investment away to the developers every year. This is what voting for the content of others means.

You can check my latest post for an explanation of this. The post is title Can Steemit Survive Burning $65 Million USD in Author and Curator Rewards Every Year?

In the new system, accounts like @utopian-io can tip as much of their Steem as they want.

There will be a difference though. In the current system, accounts like @utopian-io not only give away 6.5% of their own investment, but also 6.5% of the investment of other accounts that do not vote actively.

So, there's no need to worry about this.