sleepyshpeey

1 gram bars carry terrible premiums. Often you pay  50 euro for a gram while spot is 35 euro. You pay almost 30% premium. 
For sovereigns  you pay less than 5% premium, same goes for gold bars starting at 10 gram. 
For me it's about getting the most value for my euro. I want to buy close to spot, maybe a small premium for a nice looking coin. I won't go smaller than a gold sovereign. You can sell silver in small amounts. If I would sell gold I would just sell 10 gram bars or sovereigns and buy back silver with the amount I have left. 
You could buy something like this, low premium and can be divided:
https://www.amsterdamgold.com/en/buy-gold/gold-bars/50-gram-golden-combi-bar