The IRS just deemed BTC as Property (http://1.usa.gov/1s5nvWs)
FinCEN has stated that if you sell BTC you purchased as an investment then you are not a MSB (http://1.usa.gov/1ely4A0)
But the State of Florida two men are being charged with operating an Unlicensed Money Service Business, and trading $25,000 in cash could lead to a felony under FL state law: https://coinreport.net/bitcoin-ron-lowy-us-law/
FL Statutes: http://bit.ly/1mMzCqm
560.125 Unlicensed activity; penalties.—
(a) Currency or payment instruments exceeding $300 but less than $20,000 in any 12-month period, commits a felony of the third degree, punishable as provided in s. 775.082, s. 775.083, or s. 775.084.
(b) Currency or payment instruments totaling or exceeding $20,000 but less than $100,000 in any 12-month period, commits a felony of the second degree, punishable as provided in s. 775.082, s. 775.083, or s. 775.084.
I am not an attorney, I am not giving legal advice, but I would meet someone in SC where I have heard you do not need a MSB License at all.