"Saving money in a bank is easy, and you don't need any knowledge of the market or business." The thing that really bothered me about your sentence is that you wrote "u" in place of "you". Never do this in proper writing.

or this ? "Saving money in the bank is a easy way and you do not need to have a knowledge about the market and business"

储蓄银行的钱是不用简单的方法和u有关于市场和商业知识“ 你能说一句更好？

Saving money in a bank is an easy thing to do that you don't even need much knowledge on business and marketing.

Saving money in the bank is an easy way and you need not to have knowledge about market and business.