It doesn't work like that. There has to be a team that wants to leap ahead of someone who is likely to draft the player that this team wants. Then, it has to be a deal that works for us, too.
now, it always works on Madden, so there is that.

The funny part is it works a lot more often in real life than in Madden. Like the Ravens trade for Lamar Jackson last year, Falcons trade for Takk McKinley in 2017, Broncos trade for Paxton Lynch in 2016, Browns trade for Manziel in 2014, etc. The simulation engine on Madden almost never offers good value for picks.

So, if trading down 5-10 picks at the end of round 1 is worth a 3, and next year's 1 is equivalent value to this year's 2, trading down 20ish slots in the end of round 1 could reasonably net a 2020 1.

If it is there sure, but it very well might not be.