Wait for the Parliamentary debates, subsequent clarification and analyses/commentaries from the experts. Also, nothing is cast in stone yet ... technically. These are proposals and going forward, there could be retractions, modifications etc..

To add on, the proposal also states that RM10,000 or 10% of the gains (whichever is HIGHER) will be exempted from tax. So if you gained RM100K from selling your house, RM10K will not be taxable but the balance of RM90K will be subjected to 5% tax = RM4,500