Hi,
I just recently bought 1,000 bitcoins and want to use my position to be an OTC trader. I understand that many people are selling and buying bitcoins at 5%, I thought I can sell or buy bitcoins at 3%. So those who are selling and buying at over 5% can buy or sell bitcoins from me to sell to their customers to make 2% or higher (this figure comes from over 5% - 3%) so I can make 1% or 2% and those selling and buying over 5% can make the difference. It's kind of arbitrage for otc traders.
PM me if you are interested

It is very difficult to believe that a person who invested about 600,000$ investment has invested them to do arbitrage, although it is a way for making money but the way you are spending your time to make money seems a bit different with others.
Arbitrage is a safe way to make money. Although it is less profitable, but it has much lower risk than trading.
Arbitrage involves simultaneous buying and selling of a stock in spot and future so that we can gain from a difference in the price. To be profitable, an arbitrage trader has to do it often. The true arbitrage trader does not take any market risk. He structures a set of trades that will guarantee a riskless profit, whatever the market does afterwards.
Yes, but the profit is extremely low, I do not know exactly how much it is, but the guy who has only 600,000$ bitcoin is already rich, who does he need to do small profit arbitrages? It is the thing which does not seem logical.
If you have $600,000 bitcoin now, you will be multimillionaire in a few years time. That is very sure thing.