There's not a realistic scenario in which Lamar Jackson doesn't make a lot of money playing football for the rest of his career. There might be 10-15 truly good NFL quarterbacks this season, and at his best Jackson is one of the best in the game.
The "Jackson's-bet-on-himself-is-a-loser" takes you'll hear over the next week will be overstated and premature. He'll get paid. The Washington Commanders made a trade this past offseason so they could pay Carson Wentz $22 million this season. So, yes, Jackson will be just fine.
But it's not the contract year anyone was excited about, especially after a hot start.