Such analogy doesn't have any clear understanding except the person actually detailed out the reason that made him to say so. If you think that forex is outdated, let them think again because that's a false believe, as a matter of fact, a lot of people are into forex trading despite that not all of them is making profit but there are many people that are still learning so intensely that they may became profitable traders. When I first learned about trading, it was was even though forex I had the basic knowledge of trading and some strategies but I have chosen to base my trading on cryptocurrency and not forex again.