There are only 2,100,000,000,000,000 satoshis.

Therefore the maximum number of Bitcoins addresses that can contain value at any one time is only about 2⁵¹ and that assumes only one satoshi per address.

At the time the block chain contains 2⁵⁵ transactions it would be somewhere between a petabyte and an exabyte in size.  So a full node would need a multi petabyte drive to store the entire block chain.