Yes if you have found a good broker then there is no need to open a second account, but still if you could bifurcate your investment with two brokers then even if you get scammed then you part of the investment is safe.I have two reason why I join a forex broker site. One is that they have good ptp forum that I can earn bonus funds that I can use to trade and make profit. Two I can make good income because that forex broker site is regulated.