iPhone has been always the source of Apple's sales. And this year, Apple is going to find itself in a very intriguing position for both the company and its investors.

After the fast growth of the smarthphones that finally narrowed off in the last year's holiday quarter, some people believe the end of Apple is near, while others refuse and remain optimistic, and believe that the company still has plenty of space for growth.

According to iPhone 7's launch and Apple's latest advance on the doomsday preparation, over the past few years, history has explained why the smartphone industry relates to the future. Evidently, Apple's iPhone continues to show that it is probably the only smartphone that still excites people.

A survey conducted by the Bank of America and Merrill Lynch, in a series to determine the upcoming demand of the iPhone 7's latest lineup release of this year, predicted that it would overcome a healthier sale demand than the iPhone 6s.

A 42% out of the 1,000 respondents of the survey that are planning to buy the iPhone claimed it would be wise to wait for the release of the iPhone 7. As anticipation builds up for the release of the new smartphone, there is no doubt that iPhone sales could take a hit over the first three calendar quarters of the year.

According to Streetinsider, Apple continues to show plenty of excitement among the big spenders fan page. Additionally, 51% of those who already own an iPhone 6 or iPhone 6 Plus are planning to buy the iPhone 7, and some other 26% who are currently on the recent iPhone 6s or iPhone 6s Plus.

iPhone 5s users that are planning to upgrade to a new iPhone, 49% are aiming for the iPhone 6s or iPhone 6s Plus, while another 21% are still waiting for the iPhone7 to come out.