doubt about cloud computing myth&leyend

Hi,

we are looking for information about cloud, but on specific point of view each one of yours, I means know your opininon what do you thinks about:

1_all inHouse (on premise) upload to the cloud

2_cloud computing has 1 size, no option to resize the storage

3_virtualization=cloud

4_most benefict is to reduce cost

5_on cloud submit commodities

6_no way to out of cloud

7_public cloud isn't secure

thanks, could you write down your own words...