Jewels and Coins: Its advantage is that you can keep the gold directly with you. But, making charges have to be paid for this. This reduces your profits when selling it later. Apart from this, the concern of keeping it safe and the cost of insurance should also be taken into consideration.
Digital Gold: You can buy gold even in small amounts through mobile apps. Companies keep it safe in an insured locker. But, agencies like SEBI do not have direct control over digital gold in India. If the company suffers a financial loss, there is a slight risk of your investment being lost.