Dogecoin (DOGE-USD) jumps 37% to 43 cents after Coinbase (COIN) adds the meme-inspired alt coin to its professional trading platform."Starting immediately, we will begin accepting inbound transfers of Doge to Coinbase Pro," Coinbase said in its blog.Trading will begin on or after 9AM Pacific Time on Thursday, June 3, if liquidity conditions are met.After about a month of a cryptocurrency being listed on Coinbase Pro, Coinbase typically adds that crypto to their retail platform, according to Coindesk."Doge is not yet available on Coinbase.com or via our consumer mobile apps," Coinbase said. "We will make a separate announcement if and when this support is added."SA contributor The Asian Investor makes the case that Dogecoin's market capitalization isn't sustainable.