While it's almost impossible to be actually sure what satoshi(him/her/they) had in mind,i honestly doubt this creation was built in order to threaten the well known financial system..

The bitcoin is a p2p method of transaction,built in order to increase individual wealth by putting control in the hands of its users,now that's where the conventional system comes in, individuals lack control in it as opposed to the blockchain technology,thats what I think satoshi had in mind..

To give control to users, and leave them an opportunity to invest and get rich,all within their powers, no government,no regulations,no body,no insurance etc
Just the users/enthusiast