A 51 percent attack allows the attacker to reorganize the blocks in blockchain and that is exactly what is happening with the Grin blockchain right now. As you see in above image, an unknown miner has taken over 57 percent of total hashrate.
Popular price tracking and charting app, TabTrader has tweeted that its developers are working on a standalone PC version. This news was released when Bitcoin crossed 15,000 dollars mark. We hope to see a beta version of this windows version before it is available to the public. TabTrader is already available for iOS and Android. It allows traders to chart their favorite altcoins on the move.
There is a bitcoin wallet with whopping 69000 bitcoins, and equal amount of bitcoin cash, bitcoin SV and bitcoin gold. It is a dat file whose password has been lost so there was no way to access those bitcoins, until now. Someone was able to crack the password of this bitcoin wallet and spend 1 billion dollars that were inside it. Yes, the person behind this wallet is now a billionaire.