I believe that in a few years if marijuana is legalized; it will become a huge help to the U.S economy. Based on the success that can be seen in all other states that have legalized marijuana, and the amount of tax money that is being received for marijuana I believe that the same effect will take place for the country as a whole.
The Colorado marijuana industry has been a boost to that state's economy. This proves that it can be profitable without being disruptive to society. In order for it to make an impact on the national economy, the rest of the states, or at least a majority, would need to legalize it for recreational purposes. That said, it would likely not have a similar national effect because it would be more readily available. Colorado would also see a decrease in profits due to fewer people specifically going there to buy legal marijuana. It would provide a smaller economic boost though.
While I do not support the legalization of marijuana, I do see that it will contribute to the national economy. It is a new industry, and as such it will create businesses, jobs, and tax revenue. As more states make marijuana use and sale legal, more revenue and jobs will be created.
If the United States finally legalizes pot it will almost certainly become a huge business for our country and could pull us out of the economic slump we are in. It could revitalize the farming industry and bring more tourists to the United States. It could also help to reduce crime.