On the other hand, if you traded dollars for Bitcoin you are the slave because you need other people to invest and buy your Bitcoin otherwise you cannot get your dollars back.
You truly need some type of treatment because whatever you're saying is totally inaccurate. If you trade dollars for Bitcoin then you can trade that Bitcoin back to dollars without waiting for someone else to buy it from you.
You should learn about crypto-currency exchanges, on those exchanges there are 100's of thousands of orders that get filled within seconds. If you really want to trade your dollars for Bitcoin and then you Bitcoin for dollars, you can do that without any issues.