That's assuming your bank a) remains solvent; b) is willing to pass on the higher rate to you (which it probably won't be). So it's not at all like a rate hike, actually.
What makes you think rates are going up? The Ten Year note yield has dropped to 2.82%, an 8 month low.
there is no such thing as cash anymore. Depends on the value of a dollar, and crude. 2 yr notes have a negative return. Dividends on S&P beat the long bond. Like they say on CNBC, money is in motion. But I will agree. I'm in the largest cash position I've ever been, and I consider it my best investment at this particular moment.