This is such a tricky question!

For a font I created from scratch it would be simple, buy a license and you're done.

But for this one.. it's not my own handwriting... so I don't really know if I have the 'right' to sell it even though technically I have the copyright since I made it.
(I was trying to bypass this whole ethical problem by just making it available for free).

Guess it also depends on the kind of use.
In general I'd try to ask myself "if I'd see my own handwriting used that way would it 'offend' me" ..

Just online use of the font on a normal website in headings - no problem there if you ask me, since no direct profit will be made from it a simple crediting and link to my font site would be enough.
(But, for example, selling it as text on T-shirts/mugs whatever - that I would have a problem with since the font would be directly related to any financial gain, and it did take me well over 50 hours to make it)

So, in short. I'm not sure....