"If the value represented by AcademicCoin is increasing faster than the issuance of tokens, AcademicCoin becomes deflationary."
Yes, but that's tautological, simply the basic definition of "deflationary", not an argument.
If the act of issuing tokens is disconnected from the process of bringing value into the given ecosystem, then the act of issuing tokens is merely inflationary. If the act of issuing tokens is directly connected to bringing value ("Bob brought X units of value in, Bob gets X tokens"), then it's not really a basic income. You have to be able to remove value from some people and give it to others to create a basic income. In theory if the system were already bootstrapped inflation might be able to do it, but it would be an awfully blunt instrument, and might well still collapse the system in a standard inflationary spiral. Where basic income may be advantageous at a societal level, where the mechanisms of government can be used to force participation, you've got serious incentive problems in a voluntary system. Why wouldn't someone generating a lot of value simply opt back out of a system that deflates it away on them, when just by stepping away from it they can avoid the problem? Who's going to voluntarily sign up to be the one giving away value to others?
The libertarian skeptical about basic income (me) can't help but observe you really need government to make basic income work, if it's going to work at all. In fact, even with a government we can all observe in the real world that those with a lot of "value" (wealth) are often able to wiggle out from underneath their putative obligations even when it's not voluntary.