What happened Shares of cryptocurrency stock SOS Limited (NYSE: SOS) jumped as much as 21.7% in trading early on Friday after announcing preliminary six-month results for 2021. Shares fell from their high of the day but were still up 10.1% at 2:15 p.m. EDT. So what Management said that revenue jumped more than 17 times in the first six months of the year to $184.5 million, and gross profit rose from $0.08 million to $17.2 million. However, operating loss was still $20.4 million as stock and legal expenses weighed on results. Image source: Getty Images. Crypto mining was the clear growth driver for SOS Limited with 132.1 Bitcoins (CRYPTO: BTC) and 1,853.1 Ethereum (CRYPTO: ETH) mined in the first six months of the year. Mining rates more than doubled in the second quarter of 2021, versus the first quarter. Now what The huge jump in revenue is what investors got excited about today. What we're not seeing yet is profitability, which is what investors should look for in the second half of the year. For now, there's a lot of revenue to be made in the hot market, but to be truly sustainable, investors will want to see the bottom line improve. 10 stocks we like better than SOS LimitedWhen our award-winning analyst team has a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* They just revealed what they believe are the ten best stocks for investors to buy right now... and SOS Limited wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of August 9, 2021 Travis Hoium has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Bitcoin and Ethereum. The Motley Fool has a disclosure policy.Source