On March 12, according to official news, Rumble (RUM), a Nasdaq-listed video sharing platform invested by Tether, has spent $17.10 million to buy Bitcoin (BTC), adding 188BTC to its company funds, with an average purchase price of $91,000. Rumble shares closed down 2.38% in the previous session and rose nearly 4% in pre-market trading to $8.1.