Earlier quoted context omitted.
Sure. There's always a downside to everything. OP wanted a solution for small donations, and Nano is still the best option. It's worth it to take on some volatility risk so that the people donating know that all their donation goes directly to you, and anyone in the world can donate any amount with or without a bank account, just by showing a short address on your site's page. And no, it's not at all like an airport…
Significant volatility is not a property of any decent currencies. I respectfully disagree with your assertion of the supremacy of nano for small donations on the basis of volatility. Your statement that understanding of volatility is sufficient is [edit](incomplete IMO). Ask anyone holding Dentacoin haha.
For example, take a $1 donation that PayPal takes their 50-cent fee out of. That's a guaranteed loss of 50%. You'd have to be extremely risk adverse to take a 50% loss to avoid even crypto volatility.
It's all tradeoffs. Volatility sucks. Fees suck. But they suck more or less depending on the situation.