Short-term capital gains taxes for crypto to crypto trades?
It will depend on the tax laws in your country.

Where I live the tax law treats crypto currencies as an asset and requires that my position be reconciled at the end of each financial year for capital gains calculations. 

That's not to say I have to do any buy or sells of each year I just have to determine my paper capital gain or loss for the year in order to include it on my tax return.