Quick answer
Reliability accumulates and haste costs. The verse contrasts a quality of character with a speed, not two levels of ambition.
Read both lines
The contrast is oddly matched on purpose. One line names a kind of person, אִישׁ אֱמוּנוֹת, a man of faithfulnesses, plural, meaning someone dependable across many things. The other names a tempo. So the verse is not setting faithfulness against wealth; it is setting it against hastening, and the book has been consistent that speed is the problem rather than the money.
What it does not mean
This is not a promise of material increase for faithful people. The word rendered "blessings" covers far more than money and the verse attaches no timetable, and reading it as an investment thesis fails the first time a dependable person stays poor, which happens constantly. The book blocks that reading elsewhere itself, saying at 13:23 that lack of justice sweeps away what the poor had. What is claimed is that a faithful life gathers good things around it, which is observably true and is not a payout schedule.
Related: Proverbs 28:22 · Proverbs 13:11 · Proverbs 20:21 · Proverbs 13:23
New King James Version®, Copyright © 1982, Thomas Nelson. All rights reserved. Full copyright information. Scripture provided by API.Bible.
Go Deeper
If this verse has been used to put weight on you that it was never carrying, ask about it directly.