Bridgewater Associates founder Ray Dalio said Tuesday he is not a believer in cryptocurrencies. "Bitcoin today you can't make much transactions in it. You can't spend it very easily," Dalio said on CNBC's "Squawk Box." "It's not an effective store-hold of wealth because it has volatility to it unlike gold ... Bitcoin is a highly speculative market. Bitcoin is a bubble." The investor explained there are two important facets to being considered a valid currency, including ease of transactions as a medium of exchange and for it to be a "store-hold of wealth." "It's a shame, it could be a currency. It could work ... (full story)