The goal is to-the-point and simple: steal your bitcoins.
The strategy is one or a combination or all of the following:
1. Convince you to send the bitcoins first by providing false assurances to send payment for those coins later and/or
2. Asking you to send small amounts of bitcoins first if he detects you are paranoid about not getting paid (after all, something is better than nothing) and/or
3. Asking to check if you really are trustworthy and requesting to use teamviewer so he can try to steal your coins remotely and/or
4. Sending you fake ID and documents to give an impression of trustworthiness and/or
5. Asking you to provide sensitive information such as mnemonics or recovery phrases etc related to your wallet and/or
6. Offering to pay with risky reversible payment methods which are almost always reversed or charged-back after you send the bitcoins and/or
7. Offering to pay with stolen funds originating from hacked accounts and/or
8. Inviting you to Skype so he can financially rape you within the four walls of the chat room without being alerted or warned by vigilant members of this community.