That's what he claim, so why do you speak about "hot money" here,
If this is money that can be backed up with a source of funds evidence you should be fine to send them to TW for the beginning and find another EMI or two to spread the risk.
I have TW accounts for some time now, on some there are amounts like what you have there.
Thank you for your answer, and yes, there is no hot money involved here.