You're right, bitcoin's deflationary nature means that present spending is more expensive than future spending.
I'm no economist, but I don't believe that statement is true. Yes, bitcoin is limited in number, but that's no guarantee whatsoever that it's going to keep increasing in price. Hell, the purchasing power of the bitcoin I own has decreased by about 10% since last week, and I think altcoins have suffered even more.
But won't that make it more like gold instead of actual money?
The comparison of bitcoin with gold has been discussed to death already. They're two very different things, and their markets behave very differently. At this point gold is a commodity, not a currency (though it used to be one), whereas bitcoin is a weird hybrid of a currency and an investment--and it's that investment aspect of it that keeps it from being stable like a true currency should be.
Isn't it cool to have money that increases in value instead of fiat that keeps losing value?
Yes indeed it would be cool
if that was true. I agree fiat will keep losing value, but I don't agree that bitcoin will keep gaining value.