How do you define "safe" in this case? Bitcoin protocol and cryptography used are secure. If someone managed to get someone's else private key, most likely it's because the owner doesn't secure their device properly.

The private keys that were taken by the Department of Justice were taken from the guy's hard disk and he was using coinbase, so that goes to show you how naive some poeple can be, if you are doing something illeagal you probably should be more carfull where you put your money and how to secure it, peopel are making such a thing out of this and blaming bitcoin and thinking that blockchain can be hacked and intercepted by goivernmmnet agencies when its literly the guy who owns the key's fault for not securing it.

In a Tuesday interview with CNBC’s Squawk Box, Lasry said that while the price of Bitcoin (BTC) could go anywhere from $20,000 to $100,000, the market has been established, implying it is unlikely to go to zero. The billionaire commented that his 2018 prediction that BTC would reach $40,000 was based on institutional investors driving interest.

“Once a market is created, it’s there,” said Lasry. "The probability as more and more people keep using Bitcoin, it’s going to keep moving up. It's happened a little bit quicker than I thought it would.”

He added:

“I should have bought a lot more — that was my mistake.”

The private keys that were taken by the Department of Justice were taken from the guy's hard disk and he was using coinbase, so that goes to show you how naive some poeple can be, if you are doing something illeagal you probably should be more carfull where you put your money and how to secure it, peopel are making such a thing out of this and blaming bitcoin and thinking that blockchain can be hacked and intercepted by goivernmmnet agencies when its literly the guy who owns the key's fault for not securing it.