I was looking to invest in Dent after reading this article (see below) but I don't have any Bitcoin on the exchanges that trade in Dent, it will cost a lot in transfer fees and an lot of time to get my BTC to an exchange trading Dent, but I've an idea that I've used before and that is to buy a coin (say Verge) that has a low transfer fee and is quick to transfer send this Verge to the exchange and then, quickly, buy BTC then buy Dent. I may lose some in exchanges fees but it will probably be less than the transfer fee and definately a lot quicker.
https://cointelegraph.com/news/unknown-heroes-little-coins-that-generate-big-profitI use GAS when possible, because on most of the exchanges you don't pay anything for the transfer, just the taxes from converting the coins on the exchange itself.