In betas we have copy of our account (usually a week or two old). So you are were you where when the copy was created. In beta all prices are 10% from live server prices (anaconda cost 14 mil). Dalton Gateway has every ship for sale in starting system (lhs 3444??).
If you are far away from the bubble you can self destruct. Everything you do in beta will get wiped after beta goes to live server (horizon launch), all money earned, progress in ranks, ships and modules.
This has been the case with all previous betas and frontier hasn´t said that it would be different this time.