If your project is sufficiently popular, that's safe; otherwise maybe not.
As someone else mentioned, when a giant corp absorbs a free project, you can reasonably expect them to maintain it. If you GPL the project, that won't happen. But if it's a popular project, then if it's GPL it will attract more maintenance from people who can't free-ride on the corp's efforts.
(Note that the relevant measure of "popular" is not number of users, but number of people enthusiastic enough to actually contribute.)
IMHO, there is a simple solution to this - release the software under the GPL license. Then no corporation will want to touch it.