Im not into a security token platform, I chase decentralized platform over controlled by the government. But up for you if you really interested to invest on centralized platform. As others said invest wisely.
But 100% decentralization is never possible, if you see in case of ETH and BTC too, more than 40% of transactions are controlled by bitmain and other miners. I am sure you have heard of 51% dominance which these miners are trying to achieve and coz of the dropping prices, more and more people leaving the mining of BTC and it's just working in favor of the big cloud and ASIC miners.
Unless ETH and BTC come up with a solution to counteract this, in next 2-3 years we can easily see 51%+ attack.