The ornamental design for a multiple businesscardholder, as shown and described.
FIG. 1 is a front perspective view of a multiple business card holder showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a back elevational view thereof;
FIG. 4 is a. left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of multiple business cards in pockets is included for purpose of illustrating environment and forms no part of the claimed design.