It is necessary that all news resources use the same blockchain. Otherwise, other resources will be able to fake news and no one will pay attention to it.
Cryptocurrency was created to decentralize the economic system. All transactions are irreversible and if the cryptocurrency is stolen, you will not be able to return it. Therefore, none of the cryptocurrencies is safe.
I think at this point in time, POW is also only available to rich people. After all, to mining cryptocurrency with POW you need to buy very expensive equipment. But, with POS mining does not need to buy and maintain equipment.
The best time to invest is now! All cryptocurrency a lies on the bottom and it is better to buy it right now. Invest in cryptocurrencies from the TOP 30 to 10% of all money for each cryptocurrency.
For me 10-15 posts per week is acceptable. You need to do 2-3 fasts a day, it's very simple. They pay very good money for signature, so these conditions are acceptable.
I suggest not to invest their money in the cryptocurrency, as it is possible to lose them. It is better to earn a little on the bounty campaign and only then to invest, with the help of earnings on the bounty.