The ornamental design for a bi-fold wallet, as shown and described.
FIG. 1 is a front perspective view of a bi-fold wallet showing my new design in a closed position;
FIG. 2 is front perspective view thereof, with the wallet and inside flap in an opened position;
FIG. 3 is front elevational view thereof, with the wallet and inside flap in an opened position;
FIG. 4 is a rear elevational view thereof, with the wallet and inside flap in an opened position;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is left side elevational view thereof, with the wallet and inside flap in an opened position; and,
FIG. 8 is right side elevational view thereof, with the wallet and inside flap in an opened position.
The broken lines shown on the surface of the bi-fold wallet represent stitching and are part of the claimed design. The broken lines showing of a logo on the tag on FIGS. 1 and 4 are shown to illustrate environment only and form no part of the claimed design.