Cryptocurrency is not going to kill online advertising. At best it will help shape the online advertising ecosystem.

You are absolutely right! What a naive idea anyway.

While steem and possible competing cryptos might be making ads less needed for content creators and bloggers who are now getting their income from people ready to invest in steem, it's not a model that can complitely replace advertising.

What steem and SMTs (if they get some real adoption) bring to the table is the ability to have a bit of income from your content. But ads in their nature are not driven by just that and the money in ads are not there because of that. The money in advertising come from people that want to buy the users attention so they can sell them their products. Currently, Steem and crytocurrencies in general have nothing to offer to those businesses willing to spend big money on advertising and as long as there are people willing to pay for ads, ads in general are safe.