I've said this time and time again, we shouldn't try to get more people to invest in bitcoin. Because these forex traders are like any other trader, they don't care about the underlying tech -- they're going to make this a volatile currency which is going to lead to less and less adoption. We need volatility to go down if we want bitcoin to be a major world currency, NOT UP.
Forex traders should stick where they are, it's fine like this.
Absolitely not. Forex market is a destination point for the entire crypto trading (by crypto trading I understand margin trading). Most of the crypto traders don't care about the technology either, I bet that a good part of BTC users will not describe how it works. What really matters for traders is trading opportunities on the current market (technology is more as an influencer here).
Forex market have billions of daily volume which fullu prevents it from a significant influence of one (or even a large group) of participants of this market while crypto market can easily be dumped by any whale. That will be a great success if at least a small part of forex volume will switch into crypto.