Intervening artificially usually does not do anything except give investors or speculators a target.
If somebody from a central bank said ‘we’re going to keep the price at 10’ then everybody knows. Like with the Swiss recently. There is no risk! So artificial interference rarely works and is never good.
Jim Rogers is a smart investor who co-founded the Quantum Fund with George Soros in 1973. By 1983 the fund gained more than 4000 percent.