The 2nd house is the house of accumulated wealth and bank balances. Mercury (Budh) is the planet of intellect, writing, communication, and the pen ("kalam").
When Mercury sits positively in the 2nd house, it provides a very specific path to massive wealth. Dr. Sharma reveals that this person should never do heavy physical labor. Their fortune is tied directly to their intellect and their writing.
If they become a writer, an author, a journalist, an accountant, or a consultant—earning through the "power of the pen" ("kalam ki kamayi")—Mercury will fill their bank accounts with endless treasure ("khazane tere bharega").