To add to this, typically an NDA is signed between two parties who are offering something between each other. NDAs are typically not used between parties that have nothing to offer on another.
Blind NDAs, such as this, offer little to the signer, except to see something they may not wish to give up the right to develop in the future.
For example, I am designing a printer, I sign your NDA, see things in it that are the same as I am developing; I lose the right to discuss my own printer.
Without more information, or greater offering from you, it is unlikely that folks will just want to sign this NDA.