In Tom Walker's case, how was it dangerous for him to want to improve his lot in life?

The devil offers Tom a deal: he'll give Tom the buried treasure, but on one condition-presumably, that Tom give the devil his soul. So it is tough for Tom to improve his lot in life.

Explanation:

Tom Walker was born in Kilsyth but aged 3 his family moved to the Cheshire town of Knutsford. He described his upbringing as being in a 'Glaswegian house' as his parents were Glaswegian sounding. He speaks with a Scottish accent when with family or in Scotland.

He wanted to increase in money but the way he could do it was very tough because in return of the money he had to give his soul to the devil. So as a result of this One day, the devil takes him away on a black horse, and Tom is never seen again.