I wouldn't be surprised if some of franky1's concerns are true, but cannot confirm this as it is way beyond my technical knowledge and expertise in this area.
FYI, franky has been having his "concerns" for 3 years and counting.
Do you know what happened to the issues that Franky used to complain about? He no longer complains. Because they were demonstrated to be unproductive trolling. When he finds they don't work, he simply switches to newer trolling strategies instead.
If you'd believed anything Franky had stated or predicted, Bitcoin would be hugely unsuccessful cryptocurrency with all the users abandoning it in fear and frustration. But it keeps becoming more popular, and more successful.