from my understanding , 10 years are for big and/or old money that are in no rush for ROI. I roll 1, 3 and 6 month to have short times to wait for my capital it needed. And I buy of my TD Ameritrade account. But should be about to go old fashioned and get em at banks. As much as I love BTC, my investments are spread out from treasuries, metals, stonks and got into crypto about 3 years ago. Love the ideals of crypto, and I try to invest where I see value or inspiration where/when predictable