The amounts listed above are for client funds held with FXCM US and other US-regulated brokers. While FXCM US keeps client funds separate from operational funds, US law does not give forex trading accounts segregated funds status. This is the case for funds held with any US forex broker, not just FXCM US.
If you live in the US, only CFTC-regulated brokers are authorized to offer you forex trading services. It's worth noting, the CFTC sets capital requirements which all US forex brokers must meet ($20 million minimum plus an additional amount based on the size of client trading positions), and the CFTC has electronic access to verify the account balances of all the brokers they regulate.
If you live outside the US, you can open your trading account through FXCM UK or FXCM Australia, where client funds are segregated in accordance with UK and Australian client money rules respectively. Furthermore, since FXCM UK is regulated by the FCA, funds held with FXCM UK are insured for up to £50,000 per client by the Financial Services Protection Scheme.