The ornamental design for an inflatablefloatingbed, as shown and described.
FIG. 1 is a front elevation view of an inflatable floating bed showing my new design;
FIG. 2 is a rear elevation view thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The inflatable floating bed is shown with a symbolic break in its length. The appearance of any portion of the inflatable floating bed between the break lines forms no part of the claim.