HUGE SPOILERS FOR IF YOU'RE NOT CAUGHT UP ON THE COSMERE
(Apologies if I mess up the format. This is my first discussion post)
Adonalsium was the combined power of all of the Shards. If one took a piece of each of the Shards and combined the pieces, could it make a Shard that was basically a mini Adonalsium? There could be many advantages to this, such as not being consumed by the power (Preservation was driven to Preserve at all costs, Ruin turned Ati into a monster, Honor became obsessed with the word rather than spirit of oaths) and being able to tap into multiple magic systems.
We've seen that Hoid is collecting magic from all across the Cosmere. The bead of Lerasium is a large chunk of Preservation, a Shardblade is a piece of Honor, Breaths are pieces of Endowment, and Hoid's ability to sense where he's needed might be linked to Fortune. Perhaps his goal is related to this theory?