Typical conspiracy theory... other large brokers like IB have not gone out of business!
the lowering of leverage to 1:50 for retail traders was implemented for a good reason! to reduce the "Gambling" nature of this game!
Without such regulations crazy leverage like 1:500 would work to the benefit of brokers...
One can consider Exchange Traded Currency Futures , still get some leverage and all the advantage of being trading on an Exchange:smart:
IB is not accepting US forex traders, with some exception.
But basically, it is not a broker for normal US forex retails traders.