Yes, competition is good.
No, alts are inflationary.

Please explain...
I'll have to be brief, I'm in the middle of painting my bedroom, apologies. If you require further explanation I'll post more later or tomorrow....
Most people agree that cryptocurrencies are a new asset class, and bitcoin is the first to become established. While bitcoin is technically inflationary until the last coin is mined, this is offset by the increase in it's adoption/capitalisation. Once the last coin is mined there will be a fixed amount of bitcoins, and bitcoin inflation will stop, no more bitcoins can be created. The growth of altcoins increases the money supply within the crypto asset class, and therefore leads to crypto-inflation. The more the crypto-coins
of any kind that are created, the less each individual coin
of any kind is worth, it represents a smaller fraction of the total wealth in it's asset class. For me, and for many believers in sound money, the fixed supply of bitcoins is one of the (many) key advantages bitcoin has over the farce that fiat has become. Alt-coins are a threat to this.
You see?