Polkadot has increased more than 9 percent in the last week. It is trading at $52.87.
— Meanwhile, Rover, the pet care site sometimes referred to along with its competitor Wag as the Uber of dog walking, has retained Mercury Public Affairs as its first outside lobbying firm. Mercury’s Mike McSherry, an alum of the RNC, Republican Governors’ Association and Labor Department, will lobby for Rover on tax and labor classification issues — a development that comes as the Biden administration has pledged to recognize workers dispatched by apps as employees rather than contractors. Gig companies are also facing new tax reporting requirements beginning next year, thanks to the coronavirus stimulus bill signed into law by President Joe Biden in March.

And cryptocurrency exchanges are somewhat vulnerable to hacking, representing the most common venue for digital currency theft by hackers and cybercriminals like those responsible for taking down Mt. Gox.
Although it’s theoretically possible for a new blockchain copy’s previously unverified transactions to be entirely fee-free, this almost never happens in practice.