Purchase a china cabinet for your dining room.
If you don't have a cabinet, plates can be hung on the wall in a nice design.
Your crystal pieces will make a bigger impact if all grouped together into one area. Light will reflect the beauty of the crystal pieces. You can display in many areas and ways, sometimes a tabletop display is nice with a candle close by for a light source for reflecting the beauty of your pieces.
China or display curio cabinet.
I have only recently started collecting glass and crystal but china I have collected for many years. I hang a lot on the walls, I have a china closet and my kitchen cupboards are open so china is always on display.