Setting static anywhere... Unless your ISP is doing something really wonky, even dhcp from your ISP would stay the same.. And even if that doesn't - that is the whole point of dynamic dns.
My comment was made towards the OP comment that he has need to get to his devices, etc.. so he sets a "static" ip on them.. This is lack of understanding of how dhcp actually works is all.
Unless your connecting to some public network like at starbucks or something where there are hundreds or even 1000's of more devices using the network than what the dhcp scope is setup - unless your client actually relinquishes the lease or is offline for extended period.. Typically the client will maintain the same IP they have always gotten..
In a home setup with a handful of devices and a /24 scope.. Its almost impossible that a dhcp client would get a different IP then the first one it gets when first joining the network.. Unless old leases are removed from the dhcpd, and or dhcp server changes, etc. etc..
btw for clarity if I say set a static - I mean on the device, if done with dhcp then to me that is a "reservation" - this term static dhcp is an oxymoron...