The phrase "actual bitcoin" refers to the real and genuine form of the digital currency called Bitcoin. It implies that it is not a copy, fake, or virtual representation of Bitcoin, but the authentic version of it. Full definition
While many people are interested in investing in this space, there are some concerns about investing in actual bitcoins or other electronic currencies. (dailybitcoinnews.com)
He has already spoken about taking the next step, of trading actual Bitcoin once regulation and security matters have settled. (newsbtc.com)
Others are just novelty collectibles that don't store actual bitcoins. (bitcoinmagazine.com)