Features of Bitcoin and Bitcoin Cash

When signing a transaction, it may be necessary to generate more than one signature. On the Bitcoin network, you must provide a signature for each output you spend. If you have been receiving payments for a long time, and then you decide to make one large transfer using all or most of your available outputs, please bear in mind that the generation of all necessary signatures may take some time.

Apart from that, a large number of inputs will cause an increase in transaction fees.