Bitcoin.com is one of the world’s largest bitcoin sites, having grown its profile this year thanks to the remarkable price surge of the cryptocurrency . But its cofounder and CTO, Emil Oldenburg, a Swedish native, is extremely skeptical when it comes to bitcoin's future. ”I would say an investment in bitcoin is right now the riskiest investment you can make. There’s an extremely high risk,” he says in an interview with Swedish tech site Breakit . Although Oldenburg is far from the first to criticize the cryptocurrency's viability as an investment asset, his position as an industry insider does stand out – even as he migrates to its spinoff, bitcoin cash (BCH). “I have in fact sold all my bitcoins recently and switched to bitcoin cash,” he says, referring to the currency that split from bitcoin in August and recently overtook Ethereum as the world's second-largest cryptocurrency. Bitcoin Cash has also gained the strong support of Oldenburg's co-founder , Roger Ver. Oldenburg's big problem with bitcoin is high transaction costs and lead times. Indeed, by some counts, bitcoin transaction fees are doubling every three months , and it now takes on average 4,5 hours to confirm a bitcoin transaction. Ars Technica reported that fees reached $26 per trade recently . "When people realize how bitcoin works, they will start to sell”.While buying, selling or trading bitcoin is not an issue today, Oldenburg says, problems surface when bitcoin transactions are recorded on the blockchain, the digital ledger that records each transaction. There's only a limited amount of transactions per second you can make in the bitcoin network, which in part depends on the “block size” of the memory that store the transactions on the blockchain. This bottleneck makes for a highly risky and illiquid cryptocurrency, Oldenburg says, adding that "the old bitcoin network is as good as unusable.” The reason why bitcoin holders haven't understood these risks, according to Oldenburg, is because most have so far only bought the cryptocurrency – but never sold or traded with them. “As soon as people realize that this is how it works, they will start to sell,” he says to Breakit. All in all, he doesn’t believe bitcoin will be the currency for everyday use the world has been hoping for. Based out of Tokyo but registered on S:t Kitts, bitcoin.com has tens of millions of unique monthly visitors, according to Similarweb , a web analytics site. Bitcoin.com – not to be confused with the non-revenue makingbitcoin.org – was founded in 2015 by bitcoin investor Roger Ver, and provides a range of services related to bitcoins, including a bitcoin casino, news services and its so called bitcoin “mining pool” – the site's biggest single source of revenue – where it forges new units of the cryptocurrency to be released for trading. Oldenburg doesn't want to talk about bitcoin.com revenues or to what extent they depend on trades in BCH versus BCT, but he reveals to Breakit the company makes “