What will you do if some altcoin (XMR or ETH for example surpasses the value of BTC, either in market cap or by the price of a token each? Will you sell your BTC to buy the more "valuable" coin, or continue using and holding BTC? Also, what do you think are the chances that it could happen? I would like to hear your thoughts and opinions.
The decision to keep or not keep the crypto currency depends on many factors.
That's where in the ranking is it is not the most important factor.
If we are talking about the cost of bitcoin, that is (or were) coins more expensive bitcoin.