When the next recession strikes, interest rates have no place to go but into negative territory. The rates will be either explicitly negative, or effectively negative (inflation higher than interest rates). When that happens, bitcoin will be the only safe haven in the world to protect your wealth. The bubble people will be changing their tune very quick.
Whatever your view of the Fed is they are generally smart and well-read people who have probably also read those articles or the research papers backing them, so I think it's unlikely that interest rates will ever go negative.