The methods for buying these filaments shifted significantly over the franchise's history: :
You can no longer buy them to use for upgrades. Instead, any leftover stacks in your inventory can only be "sold" to at the Tower for small amounts of Glimmer. Historical Context and Usage helium filaments destiny buy
While you can no longer buy them for functional use, they remain a nostalgic symbol of the Moon's "grind" for veteran Guardians. The methods for buying these filaments shifted significantly
The exchange rate was typically for 20 Helium Filaments . Destiny 2 (Pre-Deprecation) : they were the "fuel" for progression.
In their prime, Helium Filaments were more than just a currency; they were the "fuel" for progression.