I volunteer with a group that makes quilts for needy families. We use donated tops - some by members of the group, others by people who, like you, no longer want to finish a project, and some by generous folks who keep us supplied with tops. Most are simple, but some are more complex. I would suggest you see if there is a similar group in your area, either by contacting local guilds or possibly through local churches or other groups that work with those in need (food banks, shelters, etc.).
You could try to sell it; if the price is right you will at least recoup some of the costs of the material that went into it, while moving it out of your home and off of your list. If you take this approach, be prepared to sell it for less than the value of the fabric that went into it, but again, realize that it is no longer taking up space.
As far as using quilts - do you mean those that are gifted? The short version of that, for me, is know your recipient. While we may love making quilts, and love quilts and use quilts ourselves, not everyone does. Our daughters, for example, much prefer the minky or fleece type of blankets, which I detest (I'm a natural fibers person). Decorating choices as far as color or style vary so much, even if you know what colors somebody likes, it's hard to know what type of quilt, if any, they would like.
And that was my short version, lol!