My advice, have a spare budget instead of putting 100% of your budget on trading and investing.
You must have these alternatives if you don't want your trading and investment plans to be disrupted, so consider them wisely before you do.
Yes exactly spare amount should be used and I think no one will use 100 percent of their budget but if someone do this then is not a good idea.
Everyone knows that in life they have to face certain harsh condition in which they will require money so for such purpose it will be helpful to save some amount for emergency action while you can invest other percentage if you want to avoid certain risk related to trading or investment.
Other thing that will help to not disrupt trading or investment is that minimum amount should be invested which will minimizes your losses as well as if you want to remove that little amount so it will not hurt you as such as the bigger amount will.