A Mountain of Mementos

Some tips and tricks:

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• As mentioned above, wear as many masks as you can, as they give a multiplier to the [currency=1719] you will be rewarded.
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• Kill all/most enemies as each kill rewards you with [currency=1719] .
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• Open as many chests as possible, as they only contain [currency=1719] .
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• Collecting as many [object=341369] as possible and turning them in to [npc=162358] will give you an extra chest of [currency=1719] .
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• The more objectives you complete per vision, the more reward chests you will have at the end, and they contain anywhere from 300 to 600 [currency=1719] each.
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Some additional info for the completionists: It takes about 70k mementos to get We Have the Technology

All in all, for me personally, I got about 2.2k [currency=1719] per run from the run itself, and and additional 2.2k [currency=1719] from the rewards chests at the end of the visions. So about 4.4-4.5K [currency=1719] per run in total, doing everything above.

Count on at least 23-25 FULL runs to complete this achievement.