For example, Calvin Ayre, a supporter of the BCH project, recently tweeted that Bitcoin was "completely worthless," while Warren Buffett, one of America's most well-known successful investors, repeatedly stated that all available cryptocurrencies (including Bitcoin too) are worthless.
Calvin is a supporter of BSV a scam promoted by his friend the fake Satoshi CSW. These people have no credibility and Warren is not a tech investor. Do you want to take a plumber's advice on repairing a car? Be my guest.
Up to 1.3%. At the time of writing, they explained that the figure was about 0.4 percent. To better understand this number, he also noted that the probability of the euro falling and depreciating to zero is about 0.0009%.
Does it mean the probability is going down every year? In 10 years it's going to be 0.01%

I'll keep my Bitcoins then.