The ornamental design for a coinholdingbase for decorative articles, as shown and described.
FIG. 1 is a front perspective view of a coin holding base for decorative articles showing our new design, shown in a used condition with a heart and stick shown in broken lines;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a back elevation view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines of the heart shaped decorative article in FIG. 1, the “Las Vegas” script shown in FIGS. 1, 2, and 6 and the coin in FIG. 6 form no part of the claimed design.