There are couple of reasons why Steem is attractive for Investors, here is our old friend @karja, who stopped posting few years ago, but set his account to automatic curation of users around 3 minute, having 300K SP he earns curation reward appr. 200 Steem a day

To burnsteem like it is now on Steemit it will not make Steem value to go up, because the amount that burnt is too low and it is done by only small acount. The suggestion to introduce Burnsteem automatically for everyone who is posting less % but for all would probably make its different but the big account did not want that.

When an Investor wants to post too then for him it is beneficial to Delegate to Upvote bot because then he gets daily automated curation by large account and gets daily dividends. This way they can still withdraw Steem after receiving rewards from posts too.

So there are three reasons and that is why Investors who are here will not leave so long they can earn this way