the big sacrifice is the CGT discount. if you think you do not need it then you can claim more deductions, such as computer, phone, electricity, etc, as a trader.
in addition, at 30 June each year, as a trader, you can mark down your "closing stock" for each share so your closing stock is at the lower of either cost price or market price for each share. this allows you to reduce or manage your tax for each year
this is different to CGT, where CGT does not allow you to offset your realised gains with unrealised losses
as a trader, you can include your unrealised losses & exclude your unrealised gains at 30 June for tax
