Sell US long term bonds

Now that my silver holdings are good and approaching my targeted 1000 oz, I've started shorting US long-term government bond. This is by far the biggest bubble in the world, and I've been waiting to short it for a few years. The bond market has been in a bull run for some odd 30 years. Many don't realise it, but this is classic euphoria. I'm in this for the long haul. Possibly months or years. I will look to short corporate bonds in the near future. I think those will go first, but haven't done enough research on them. Who knows when these bubbles will burst? I'll rather be early than late.